Re: [PERFORM] software vs hw hard on linux

2003-09-14 Thread Cott Lang
On Fri, 2003-09-12 at 07:34, Jeff wrote: What I'm wondering about is what folks experience with software raid vs hardware raid on linux is. A friend of mine ran a set of benchmarks at work and found sw raid was running obscenely faster than the mylex and (some other brand that isn't 3ware)

Re: [PERFORM] software vs hw hard on linux

2003-09-12 Thread Josh Berkus
Jeff, What I'm wondering about is what folks experience with software raid vs hardware raid on linux is. A friend of mine ran a set of benchmarks at work and found sw raid was running obscenely faster than the mylex and (some other brand that isn't 3ware) raids.. Our company has stopped

Re: [PERFORM] software vs hw hard on linux

2003-09-12 Thread Vivek Khera
J == Jeff [EMAIL PROTECTED] writes: J Due to various third party issues, and the fact PG rules, we're planning J on migrating our deplorable informix db to PG. It is a rather large DB J with a rather high amount of activity (mostly updates). So I'm going to If at all possible, batch your

Re: [PERFORM] software vs hw hard on linux

2003-09-12 Thread Christopher Browne
[EMAIL PROTECTED] (Jeff) writes: On the pro-sw side you have lots of speed and less cost (unfortunately, there is a pathetic budget so spending $15k on a raid card is out of the question really). I have been playing with a Perq3 QC card http://www.scsi4me.com/?menu=menu_scsipid=143 which

Re: [PERFORM] software vs hw hard on linux

2003-09-12 Thread aturner
My personal experience with RAID cards is that you have to spend money to get good performance. You need battery backed cache because RAID 5 only works well with write to cache turned on, and you need a good size cache too. If you don't have it, RAID 5 performance will suck big time. If you